Lightweight, durable closed cell foam expansion joint is stiff enough to use on straight joints, and is flexible enough to shape to contours on concrete applications. Will not break prematurely during job site handling. Has virtually zero water absorption and, because of its foam construction, does not facilitate destructive termites. UV resistant which prevents degradation from the sun. Environmentally friendly product is made from recyclable resins and is CFC and HCFC free. Tear strip can be reused as a backer rod. Works with many sealants. Exceeds ASTM standards D-4819 and D-3575. 50' L. x 1/2" T. Black.